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Wang HF, Kuang MJ, Han SJ, Wang AB, Qiu J, Wang F, Tan BY, Wang DC. Correction to: BMP2 Modified by the m 6A Demethylation Enzyme ALKBH5 in the Ossification of the Ligamentum Flavum Through the AKT Signaling Pathway. Calcif Tissue Int 2024; 114:556-557. [PMID: 38557868 DOI: 10.1007/s00223-024-01206-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Affiliation(s)
- Hai-Feng Wang
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - Ming-Jie Kuang
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - Shi-Jie Han
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - An-Bang Wang
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - Jie Qiu
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - Feng Wang
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - Bing-Yi Tan
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China
| | - Da-Chuan Wang
- Department of Orthopedics, The Provincial Hospital Affiliated to Shandong University, Shandong, 250014, China.
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Lu LL, Liu H, Zhao KP, Wang J, Miao Y, Lin HC, Hao GY, Han SJ. Seasonal patterns of nonstructural carbohydrate storage and mobilization in two tree species with distinct life-history traits. Tree Physiol 2024:tpae042. [PMID: 38602710 DOI: 10.1093/treephys/tpae042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 01/30/2024] [Accepted: 04/03/2024] [Indexed: 04/12/2024]
Abstract
Nonstructural carbohydrates (NSC) are essential for tree growth and adaptation, yet our understanding of the seasonal storage and mobilization dynamics of whole-tree NSC is still limited, especially when tree functional types are involved. Here, Quercus acutissima Carruth. and Pinus massoniana Lamb. with distinct life-history traits (i.e., a deciduous broadleaf species vs. an evergreen coniferous species) were studied to assess the size and seasonal fluctuations of organ and whole-tree NSC pools with a focus on comparing differences in carbon resource mobilization patterns between the two species. We sampled the organs (leaf, branch, stem, and root) of the target trees repeatedly over four seasons of the year. Then, NSC concentrations in each organ were paired with biomass estimates from the allometric model to generate whole-tree NSC pools. The seasonal dynamics of the whole-tree NSC of Q. acutissima and P. massoniana reached the peak in autumn and summer, respectively. The starch pools of the two species were supplemented in the growing season while the soluble sugar pools were the largest in the dormant season. Seasonal dynamics of organ-level NSC concentrations and pools were affected by organ type and tree species, with above-ground organs generally increasing during the growing season and P. massoniana roots decreasing during the growing season. In addition, the whole-tree NSC pools of P. massoniana were larger but Q. acutissima showed larger seasonal fluctuations, indicating that larger storage was not associated with more pronounced seasonal fluctuations. We also found that the branch and root were the most dynamic organs of Q. acutissima and P. massoniana, respectively, and were the major suppliers of NSC to support tree growth activities. These results provide fundamental insights into the dynamics and mobilization patterns of NSC at the whole-tree level, and have important implications for investigating environmental adaptions of different tree functional types.
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Affiliation(s)
- Long-Long Lu
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Hao Liu
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Kun-Peng Zhao
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Jing Wang
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Yuan Miao
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Hai-Chang Lin
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Guang-You Hao
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
| | - Shi-Jie Han
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
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Han SJ, Tian B, Dong SP. [Developing traditional medical heritage for further achievements in medical history and literature research-Commemorating the establishment of China Institute for History of Medicine and Medical Literature in the China Academy of Traditional Chinese Medicine]. Zhonghua Yi Shi Za Zhi 2023; 53:214-221. [PMID: 37727000 DOI: 10.3760/cma.j.cn112155-20221011-00141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
The Institute of Chinese Medical History and Literature in the China Academy of Traditional Chinese Medicine was officially established on May 28, 1982. Its predecessor was the Medical History Research Office in the Chinese Medicine Institute of the Central Institute of Health, the Editorial Office of the China Academy of Traditional Chinese Medicine, and the Theory and Literature Research Office of the Institute of Acupuncture and Moxibustion. Before that, the Research Office of Chinese Medical History and Literature in the China Academy of Traditional Chinese Medicine was established in 1971. It made remarkable achievements in scientific research, personnel training and discipline construction in terms of medical history and literature. It was upgraded to the Institute with the approval of the Ministry of Health in 1980. After its establishment, the institute has benefited from great achievements.
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Affiliation(s)
- S J Han
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - B Tian
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - S P Dong
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Chen RD, Yang CW, Zhu QR, Li Y, Hu HF, Wang DC, Han SJ. Comparison of the Effects of Metformin and Thiazolidinediones on Bone Metabolism: A Systematic Review and Meta-Analysis. Medicina (Kaunas) 2023; 59:medicina59050904. [PMID: 37241136 DOI: 10.3390/medicina59050904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/20/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023]
Abstract
OBJECTIVES Studies have shown that people with diabetes have a high risk of osteoporosis and fractures. The effect of diabetic medications on bone disease cannot be ignored. This meta-analysis aimed to compare the effects of two types of glucose-lowering drugs, metformin and thiazolidinediones (TZD), on bone mineral density and bone metabolism in patients with diabetes mellitus. METHODS This systematic review and meta-analysis were prospectively registered on PROSPERO, and the registration number is CRD42022320884. Embase, PubMed, and Cochrane Library databases were searched to identify clinical trials comparing the effects of metformin and thiazolidinediones on bone metabolism in patients with diabetes. The literature was screened by inclusion and exclusion criteria. Two assessors independently assessed the quality of the identified studies and extracted relevant data. RESULTS Seven studies involving 1656 patients were finally included. Our results showed that the metformin group had a 2.77% (SMD = 2.77, 95%CI [2.11, 3.43]; p < 0.00001) higher bone mineral density (BMD) than the thiazolidinedione group until 52 weeks; however, between 52 and 76 weeks, the metformin group had a 0.83% (SMD = -0.83, 95%CI: [-3.56, -0.45]; p = 0.01) lower BMD. The C-terminal telopeptide of type I collagen (CTX) and procollagen type I N-terminal propeptide (PINP) were decreased by 18.46% (MD = -18.46, 95%CI: [-27.98, -8.94], p = 0.0001) and 9.94% (MD = -9.94, 95%CI: [-16.92, -2.96], p = 0.005) in the metformin group compared with the TZD group.
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Affiliation(s)
- Ru-Dong Chen
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
| | - Cong-Wen Yang
- Department of Neurosurgery, Weifang Medical University, Weifang 261042, China
| | - Qing-Run Zhu
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
| | - Yu Li
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
| | - Hai-Feng Hu
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
| | - Da-Chuan Wang
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
| | - Shi-Jie Han
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
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Kommers IO, Eijgelaar RS, Barkhof F, Bouget D, Pedersen A, Ardon H, Bello L, Berger MS, Bouwknegt W, Conti Nibali M, Furtner J, Han SJ, Han SJ, Hervey-Jumper S, Hervey-Jumper S, Idema AJS, Kiesel B, Kloet A, Nandoe Tewarie R, Mandonnet E, Reinertsen I, Robe PA, Rossi M, Sciortino T, Solheim O, van den Brink WA, Vandertop PW, Wagemakers M, Widhalm G, Witte MG, Zwinderman AH, De Witt Hamer PC. P11.37.B When to resect or biopsy for patients with supratentorial glioblastoma: a multivariable prediction model. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
The prospects of a patient with suspected glioblastoma may rely heavily on the indication for surgical resection versus biopsy only. Biopsy percentages vary considerably across hospitals and guidelines for treatment of glioblastoma lack criteria for surgical decision-making. To identify patient and tumor characteristics associated with the decision to resect or biopsy a glioblastoma and to develop and validate a prediction model for decision support.
Material and Methods
Clinical data and pre-operative MRI scans were collected for adults who underwent first-time surgery for supratentorial glioblastoma from a registry-based cohort study of 12 hospitals from the Netherlands, Germany, France, Italy, and the United States between 1st of January 2007 and 31st of December 2011. The main outcome was the type of surgical procedure: surgical resection or biopsy only. Predictors were patient- and tumor-related characteristics. Radiological factors were extracted from MRI using an automated tumor segmentation method. A prediction model was constructed using multivariable logistic regression analysis. The model was cross-validated and externally validated with a leave-one-hospital-out approach.
Results
Out of 1053 patients treated for glioblastoma, 28% underwent biopsy only. Biopsy rates varied from 15-40% across hospitals. The prediction model showed excellent discrimination with an average area under the curve of 0.86. Of the patient-related characteristics, younger age was associated more with resection and Karnofsky Performance Score of 60 or less with biopsy. Of the tumor-related characteristics, a location in the right hemisphere, unifocality, no tumor midline crossing, and no involvement of the cortical spinal tract, were associated with resection, as well as a high expected resectability index, a location in the right occipital lobe, and a higher percentage of tumor in Schaefer’s dorsal or ventral attention, limbic, and default networks. External validation proved acceptable to outstanding discrimination with areas under the curve ranging between 0.79 and 0.92 for hospitals.
Conclusion
A prediction model is presented and validated to support the decision to resect or to biopsy a patient with a suspected supratentorial glioblastoma. In this prediction model, tumor-related characteristics were more informative than patient-related factors. This may support surgical decision-making for individual patients, or facilitate comparisons of patient cohorts between surgeons or institutions.
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Affiliation(s)
- I O Kommers
- Department of Neurosurgery, Amsterdam University Medical Centers, Vrije Universiteit , Amsterdam , Netherlands
- Cancer Center Amsterdam, Brain Tumor Center, Amsterdam University Medical Centers , Amsterdam , Netherlands
| | - R S Eijgelaar
- Department of Neurosurgery, Amsterdam University Medical Centers, Vrije Universiteit , Amsterdam , Netherlands
- Cancer Center Amsterdam, Brain Tumor Center, Amsterdam University Medical Centers , Amsterdam , Netherlands
| | - F Barkhof
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Vrije Universiteit , Amsterdam , Netherlands
- Institutes of Neurology and Healthcare Engineering, University College London , London , United Kingdom
| | - D Bouget
- Department of Health Research, SINTEF Digital , Trondheim , Norway
| | - A Pedersen
- Department of Health Research, SINTEF Digital , Trondheim , Norway
| | - H Ardon
- Department of Neurosurgery, Twee Steden Hospital , Tilburg , Netherlands
| | - L Bello
- Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Humanitas Research Hospital, Università Degli Studi di Milano , Milano , Italy
| | - M S Berger
- Department of Neurological Surgery, University of California San Francisco , San Fransisco, CA , United States
| | - W Bouwknegt
- Medische Kliniek Velsen , Velsen , Netherlands
| | - M Conti Nibali
- Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Humanitas Research Hospital, Università Degli Studi di Milano , Milano , Italy
| | - J Furtner
- Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna , Wien , Austria
| | - S J Han
- Department of Neurological Surgery, Oregon Health & Science University , Portland, OR , United States
| | - S J Han
- Department of Neurological Surgery, Oregon Health & Science University , Portland, OR , United States
| | - S Hervey-Jumper
- Department of Neurological Surgery, University of California San Francisco , San Fransisco, CA , United States
| | - S Hervey-Jumper
- Department of Neurological Surgery, University of California San Francisco , San Fransisco, CA , United States
| | - A J S Idema
- Department of Neurosurgery, Northwest Clinics , Alkmaar , Netherlands
| | - B Kiesel
- Department of Neurosurgery, Medical University Vienna, , Wien , Austria
| | - A Kloet
- Department of Neurosurgery, Haaglanden Medical Center , The Hague , Netherlands
| | - R Nandoe Tewarie
- Department of Neurosurgery, Haaglanden Medical Center , The Hague , Netherlands
| | - E Mandonnet
- Department of Neurological Surgery, Hôpital Lariboisière , Paris , France
| | - I Reinertsen
- Department of Health Research, SINTEF Digital , Trondheim , Norway
| | - P A Robe
- Department of Neurology and Neurosurgery, University Medical Center Utrecht , Utrecht , Netherlands
| | - M Rossi
- Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Humanitas Research Hospital, Università Degli Studi di Milano , Milano , Italy
| | - T Sciortino
- Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Humanitas Research Hospital, Università Degli Studi di Milano , Milano , Italy
| | - O Solheim
- Department of Neurosurgery, St. Olavs University Hospital , Trondheim , Norway
- Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology , Trondheim , Norway
| | | | - P W Vandertop
- Department of Neurosurgery, Amsterdam University Medical Centers, Vrije Universiteit , Amsterdam , Netherlands
- Cancer Center Amsterdam, Brain Tumor Center, Amsterdam University Medical Centers , Amsterdam , Netherlands
| | - M Wagemakers
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen , Groningen , Netherlands
| | - G Widhalm
- Department of Neurosurgery, Medical University Vienna , Wien , Austria
| | - M G Witte
- Department of Radiation Oncology, The Netherlands Cancer Institute , Amsterdam , Netherlands
| | - A H Zwinderman
- Department of Clinical Epidemiology and Biostatistics, Amsterdam University Medical Centers, University of Amsterdam , Amsterdam , Netherlands
| | - P C De Witt Hamer
- Department of Neurosurgery, Amsterdam University Medical Centers, Vrije Universiteit , Amsterdam , Netherlands
- Cancer Center Amsterdam, Brain Tumor Center, Amsterdam University Medical Centers , Amsterdam , Netherlands
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Wang ZP, Li HL, Wu HH, Han SJ, Huang JH, Zhang XM, Han XG. Methane Concentration in the Heartwood of Living Trees and Estimated Methane Emission on Stems in Upland Forests. Ecosystems 2021. [DOI: 10.1007/s10021-020-00596-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Han SJ, Dong SP. [Tour of the History Exhibition Hall of the Chinese Academy of Chinese Medical Sciences: To commemorate the 65th anniversary of the Chinese Academy of Chinese Medical Sciences]. Zhonghua Yi Shi Za Zhi 2020; 50:323-340. [PMID: 33596609 DOI: 10.3760/cma.j.cn112155-20191128-00118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In 2015, 60th anniversary of China Academy of Chinese Medical Sciences(CACMS), the History Exhibition Hall of it was opened to the public. The History Exhibition Hall collecting 29504 pages of documents, and 26386 pictures, 1050 materials, reveal the history of founding and development of CACMS. 2020 is the 65th anniversary of CACMS. Taking the 87 groups representative collections as examples, briefly review the development history of CACMS from five aspects: figures, scientific research, medical treatment, education and industry.
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Affiliation(s)
- S J Han
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - S P Dong
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Yang FY, Li YJ, Han SJ, Chen D, Wu LY, Xiao ZJ, Li CL, Xing NZ. [The preliminary clinical study on radical prostatectomy without preoperative prostate biopsy]. Zhonghua Yi Xue Za Zhi 2020; 100:2658-2662. [PMID: 32921013 DOI: 10.3760/cma.j.cn112137-20200104-00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the feasibility and safety of minimally invasive radical prostatectomy for prostate cancer patients without preoperative prostate biopsy in the new era of the continuous development of comprehensive new imaging diagnostic mode and minimally invasive surgery technology. Methods: From August 2018 to October 2019, 17 patients with prostate cancer were enrolled in this study in the Cancer Hospital, Chinese Academy of Medical Sciences. All patients were highly suspected of prostate cancer by PSMA-PET/CT-based imaging diagnostic techniques and underwent 3D laparoscopic radical prostatectomy without prostate biopsy. The perioperative data, postoperative pathology, postoperative complications and follow-up results were recorded and analyzed. Results: The average age of 17 patients with prostate cancer was (65±7) years. The body mass index (BMI) average was (24.4±3.0) kg/m(2). The American Society of Anesthesiologists (ASA) score was 1 (1-2) and the Charlson comorbidity index (CCI) score was 1 (0-4). The preoperative value of PSA was (19±11) μg/L. The PSMA PET/CT showed abnormally high expression foci and the great possibility of prostate cancer for all the 17 patients. Prostate puncture biopsy: the results of prostate biopsy were negative in 3 cases. The digital rectal examination found that the prostate volume was Ⅰ or Ⅱ degree large, 10 cases touched hard and the nodule was touched in two cases. Three patients had undergone a previous prostate biopsy, but prostate cancer was not found. All the 17 operations were successfully performed without conversion to open surgery. The surgery time was (85±21) (range from 45 to 120) min, the estimated blood loss was (25±18) (range from5 to 100) ml, the time of intake of liquid diet was (14.3±4.4) h, the intestinal recovery time was (23±10) h, the postoperative activity time was (22±7) h, the drainage duration was (3.7±0.8) d, the postoperative hospital stay was (4.9±1.2) days, and the catheter removal time was (7.4±1.5) days. In the early postoperative period (within 30 days after surgery), no obvious complications occurred. The postoperative final pathology confirmed that all the 17 specimens were prostate cancer. After a median follow-up of 6.5 months, the patient's urinary control rate reached 81.3% at postoperative 1 month, 92.3% at postoperative 3 months after surgery, and the urinary control rate reached 100% at postoperative 6 months. Postoperative PSA value was (0.08±0.08) μg/L, significantly lower than preoperative PSA level (P<0.001). There was significant difference between the preoperative and postoperative QOL (Quality of life) score (57±5 and 47±5 respectively, P<0.001) which indicated that the patients' postoperative quality of life was greatly improved. Conclusions: It is safe and feasible to perform minimally invasive radical prostatectomy without preoperative prostate biopsy for patients with highly suspected prostate cancer by comprehensive diagnostic mode based on modern new imaging technology.
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Affiliation(s)
- F Y Yang
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y J Li
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S J Han
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - D Chen
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L Y Wu
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Z J Xiao
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - C L Li
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Z Xing
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Barajas RF, Schwartz D, McConnell HL, Kersch CN, Li X, Hamilton BE, Starkey J, Pettersson DR, Nickerson JP, Pollock JM, Fu RF, Horvath A, Szidonya L, Varallyay CG, Jaboin JJ, Raslan AM, Dogan A, Cetas JS, Ciporen J, Han SJ, Ambady P, Muldoon LL, Woltjer R, Rooney WD, Neuwelt EA. Distinguishing Extravascular from Intravascular Ferumoxytol Pools within the Brain: Proof of Concept in Patients with Treated Glioblastoma. AJNR Am J Neuroradiol 2020; 41:1193-1200. [PMID: 32527840 DOI: 10.3174/ajnr.a6600] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 04/02/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND PURPOSE Glioblastoma-associated macrophages are a major constituent of the immune response to therapy and are known to engulf the iron-based MR imaging contrast agent, ferumoxytol. Current ferumoxytol MR imaging techniques for localizing macrophages are confounded by contaminating intravascular signal. The aim of this study was to assess the utility of a newly developed MR imaging technique, segregation and extravascular localization of ferumoxytol imaging, for differentiating extravascular-from-intravascular ferumoxytol contrast signal at a delayed 24-hour imaging time point. MATERIALS AND METHODS Twenty-three patients with suspected post-chemoradiotherapy glioblastoma progression underwent ferumoxytol-enhanced SWI. Segregation and extravascular localization of ferumoxytol imaging maps were generated as the voxelwise difference of the delayed (24 hours) from the early (immediately after administration) time point SWI maps. Continuous segregation and extravascular localization of ferumoxytol imaging map values were separated into positive and negative components. Image-guided biologic correlation was performed. RESULTS Negative segregation and extravascular localization of ferumoxytol imaging values correlated with early and delayed time point SWI values, demonstrating that intravascular signal detected in the early time point persists into the delayed time point. Positive segregation and extravascular localization of ferumoxytol imaging values correlated only with delayed time point SWI values, suggesting successful detection of the newly developed extravascular signal. CONCLUSIONS Segregation and extravascular localization of ferumoxytol MR imaging improves on current techniques by eliminating intrinsic tissue and intravascular ferumoxytol signal and may inform glioblastoma outcomes by serving as a more specific metric of macrophage content compared with uncorrected T1 and SWI techniques.
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Affiliation(s)
- R F Barajas
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
- Advanced Imaging Research Center (R.F.B. Jr, D.S., X.L., A.H., W.D.R.)
- Knight Cancer Institute Translational Oncology Research Program (R.F.B. Jr)
| | - D Schwartz
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
- Advanced Imaging Research Center (R.F.B. Jr, D.S., X.L., A.H., W.D.R.)
| | - H L McConnell
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
| | - C N Kersch
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
| | - X Li
- Advanced Imaging Research Center (R.F.B. Jr, D.S., X.L., A.H., W.D.R.)
| | - B E Hamilton
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
| | - J Starkey
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
| | - D R Pettersson
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
| | - J P Nickerson
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
| | - J M Pollock
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
| | - R F Fu
- Medical Informatics and Clinical Epidemiology (R.F.F.)
| | - A Horvath
- Advanced Imaging Research Center (R.F.B. Jr, D.S., X.L., A.H., W.D.R.)
| | - L Szidonya
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
- Department of Diagnostic Radiology (L.S.), Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - C G Varallyay
- From the Departments of Radiology (R.F.B. Jr, D.S., B.E.H., J.S., D.R.P., J.P.N., J.M.P., L.S., C.G.V.)
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
| | | | - A M Raslan
- Neurological Surgery (A.M.R., A.D., J.S.C., J.C., S.J.H., E.A.N.)
| | - A Dogan
- Neurological Surgery (A.M.R., A.D., J.S.C., J.C., S.J.H., E.A.N.)
| | - J S Cetas
- Neurological Surgery (A.M.R., A.D., J.S.C., J.C., S.J.H., E.A.N.)
| | - J Ciporen
- Neurological Surgery (A.M.R., A.D., J.S.C., J.C., S.J.H., E.A.N.)
| | - S J Han
- Neurological Surgery (A.M.R., A.D., J.S.C., J.C., S.J.H., E.A.N.)
| | - P Ambady
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
| | - L L Muldoon
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
| | | | - W D Rooney
- Advanced Imaging Research Center (R.F.B. Jr, D.S., X.L., A.H., W.D.R.)
| | - E A Neuwelt
- Departments of Neurology (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.)
- Neurological Surgery (A.M.R., A.D., J.S.C., J.C., S.J.H., E.A.N.)
- Blood-Brain Barrier Program (H.L.M., C.N.K., L.S., C.G.V., P.A., L.L.M., E.A.N.), Oregon Health & Science University, Portland, Oregon
- Portland Veterans Affairs Medical Center (E.A.N.), Portland, Oregon
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10
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Wang HF, Kuang MJ, Han SJ, Wang AB, Qiu J, Wang F, Tan BY, Wang DC. BMP2 Modified by the m 6A Demethylation Enzyme ALKBH5 in the Ossification of the Ligamentum Flavum Through the AKT Signaling Pathway. Calcif Tissue Int 2020; 106:486-493. [PMID: 31897529 DOI: 10.1007/s00223-019-00654-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/23/2019] [Indexed: 02/06/2023]
Abstract
Ossification of the ligamentum flavum (OLF) is characterized by a process of ectopic bone formation in the ligamentum flavum. The definitive pathophysiology of OLF still remains unclear, but the epigenetic m6A modification plays an important role in OLF. In addition, no studies have reported the function of ALKBH5 in OLF development. In this study, we investigated the function of the m6A demethylation enzyme ALKBH5 in OLF. To evaluate the function of ALKBH5, OLF tissues and normal ligamentum flavum tissues were collected. In vitro methods, including HE, IHC and western blotting assays, were used to evaluate the association of ALKBH5 with OLF. In addition, we verified the effects of ALKBH5 on osteogenesis using alizarin red and ALP staining. MeRIP q-PCR was performed to investigate the methylation level of BMP2. Moreover, the mechanism of ALKBH5-mediated regulation of the ossification of the ligamentum flavum cells through the AKT signaling pathway was also verified. The present study showed that the expression of ALKBH5 increased in OLF tissues. The overexpression of ALKBH5 increased the expression of osteogenic genes and promoted the ossification of ligamentum flavum cells. Furthermore, BMP2 was significantly enriched in the ligamentum flavum cells of the anti-m6A group compared with those of the IgG group. The overexpression of ALKBH5 led to the activation of p-AKT, and BMP2 was regulated by ALKBH5 through the AKT signaling pathway. ALKBH5 promoted the osteogenesis of the ligamentum flavum cells through BMP2 demethylation and AKT activation. ALKBH5 was shown to be an important demethylation enzyme in OLF development.
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Affiliation(s)
- Hai-Feng Wang
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - Ming-Jie Kuang
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - Shi-Jie Han
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - An-Bang Wang
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - Jie Qiu
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - Feng Wang
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - Bing-Yi Tan
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China
| | - Da-Chuan Wang
- Department of Orthopedics, The Provincial Hospital Affiliated To Shandong University, Shandong, 250014, China.
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11
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Bullis CL, Maldonado-Perez A, Bowden SG, Yaghi N, Munger D, Wood MD, Barajas RF, Ambady P, Neuwelt EA, Han SJ. Diagnostic impact of preoperative corticosteroids in primary central nervous system lymphoma. J Clin Neurosci 2020; 72:287-291. [PMID: 31648968 DOI: 10.1016/j.jocn.2019.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/04/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE High dose corticosteroids are an effective tool for rapidly alleviating neurologic symptoms caused by intracranial mass lesions. However, there is concern that preoperative corticosteroids limit the ability to obtain a definitive pathologic diagnosis, particularly if imaging features suggest primary central nervous system lymphoma (PCNSL). METHODS To explore the impact of preoperative corticosteroids in newly diagnosed PCNSL patients, from 2009 to 2018 treated at our institution. RESULTS We identified 54 patients; 18 had received corticosteroids prior to biopsy or resection. Only in one case did the patient have a prior non-diagnostic biopsy, requiring a second procedure. The cumulative doses of preoperative dexamethasone ranged from 4 mg to 120 mg (mean 32 mg, median 24 mg), given over 1-14 days (mean 2 days, median 1 day), and the majority had received corticosteroids for only 1-2 days. There was a trend for a larger diameter of lesional T1 contrast enhancement for patients who received steroids (39 mm vs. 34 mm, p = 0.11). In this series of cases with pathologically and clinically proven PCNSL, preoperative corticosteroids had been given in a third of cases, suggesting that they may be given for symptomatic relief without compromising pathologic diagnosis. CONCLUSIONS Despite the commonly held tenet that preoperative corticosteroids can obscure the pathologic diagnosis in PCNSL, this is likely not the case in the majority of patients who receive a short course preoperatively. Obtaining a second stereotactic scan to confirm continued presence of the lesion prior to tissue sampling may also mitigate these concerns.
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Affiliation(s)
- C L Bullis
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, United States
| | - A Maldonado-Perez
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, United States; Ponce Health Sciences University, Ponce, PR, United States
| | - S G Bowden
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, United States
| | - N Yaghi
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, United States
| | - D Munger
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, United States
| | - M D Wood
- Department of Pathology (Neuropathology), Oregon Health & Science University, Portland, OR, United States
| | - R F Barajas
- Department of Radiology, Oregon Health & Science University, Portland, OR, United States
| | - P Ambady
- Department of Neurology, Oregon Health & Science University, Portland, OR, United States
| | - E A Neuwelt
- Department of Neurology, Oregon Health & Science University, Portland, OR, United States
| | - S J Han
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, United States.
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12
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Han SJ, Wang J, Yan QS, Yang LM, Zhao QY, Wang SB, Li C, Zhang YS, Zhang RQ. [Health Benefit Evaluation for PM 10 and PM 2.5 Pollution Control in Zhengzhou, China, 2014-2016]. Huan Jing Ke Xue 2020; 40:2565-2571. [PMID: 31854647 DOI: 10.13227/j.hjkx.201810255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Based on the annual average concentration values, the health effects and health benefits as well as 95% confidence intervals of PM10 and PM2.5 pollution control from 2014 to 2016 in Zhengzhou were evaluated by applying the Poisson regression relative risk model. Results showed that the health benefits of PM10 pollution control were 18.18 billion RMB (15.04, 21.12), 24.25 billion RMB (20.25, 27.94), and 20.62 billion RMB (17.33, 23.92), which accounted for 2.7%, 3.3%, and 2.5% of the GDP of Zhengzhou, respectively, in 2014-2016. The health benefits of PM2.5 pollution control were 17.88 billion RMB (14.37, 21.16), 21.65 billion RMB (17.46, 25.53), and 17.25 billion RMB (13.78, 20.55), which accounted for 2.6%, 3.0%, and 2.1% of the GDP of Zhengzhou, respectively, in 2014-2016. After the PM10 and PM2.5 pollution was controlled, the number of urban beneficiaries was higher than that of rural areas, and acute bronchitis beneficiaries were higher than the beneficiaries of other health end-points. For chronic bronchitis, adults benefited more than children, while the opposite occurred for asthma. In this study, chronic bronchitis had the highest health benefit, followed by asthma, and outpatient and inpatient setting had the lower health benefits.
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Affiliation(s)
- Shi-Jie Han
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jia Wang
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Qi-She Yan
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Liu-Ming Yang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qing-Yan Zhao
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Shen-Bo Wang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Chen Li
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yi-Shun Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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13
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He RD, Zhang YS, Chen YY, Jin MJ, Han SJ, Zhao JS, Zhang RQ, Yan QS. [Heavy Metal Pollution Characteristics and Ecological and Health Risk Assessment of Atmospheric PM 2.5 in a Living Area of Zhengzhou City]. Huan Jing Ke Xue 2019; 40:4774-4782. [PMID: 31854542 DOI: 10.13227/j.hjkx.201905066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To study the pollution characteristics of atmospheric heavy metal elements in a living area of Zhengzhou City, assess the potential ecological risks, and determine risks to resident health in this city, the Wuhan Tianhong TH-16A Airborne Particles Intelligent Sampler was used to collect atmospheric PM2.5 in Zhengzhou City. The mass concentrations of 17 metal elements were analyzed by ambient air determination of inorganic elements by ambient particle matter wavelength dispersive X-ray fluorescence spectrometry. The source of heavy metals was analyzed by the enrichment factor method and principal component analysis. The ecological risk index method and the US Environmental Protection Agency's health risk assessment method were used to evaluate the potential ecological risks and residents' health risks from Cr, Cd, Cu, Zn, Ni, Pb, As, and other elements. The results showed that metals with higher enrichment factor values were Cd, Sb, Pb, and As, and Cd had the highest enrichment factor value. The sources of metal elements in a living area of Zhengzhou City were mainly crust/burning coal, fuel, garbage burning, metallurgical dust, and vehicle emission. The single factor potential ecological hazard index values of Cd, Pb, Zn, As, Cu, Ni, and Cr were 70420.2, 255.3, 204.6, 71.5, 36.9, 24.0, and 5.1, respectively. Cd, As, and Cr in a living area of Zhengzhou City posed a cancer risk, and Cd was the most harmful. Mn had a non-carcinogenic risk.
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Affiliation(s)
- Rui-Dong He
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yi-Shun Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yong-Yang Chen
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Meng-Jie Jin
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Shi-Jie Han
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jin-Shuai Zhao
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qi-She Yan
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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14
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Zhang YS, Wang J, Han SJ, He RD, Chen YY, Jin MJ, Zhao QY, Zhang RQ, Yan QS. [Emission Characteristics Analysis and Health Risk Assessment of Unorganized VOCs in the Carbon Industry, Zhengzhou]. Huan Jing Ke Xue 2019; 40:4847-4855. [PMID: 31854550 DOI: 10.13227/j.hjkx.201905048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The three typical carbon enterprises in Zhengzhou were selected as research targets, and the emission characteristics of volatile organic compounds (VOCs) and their ozone formation potential (OFP) in different functional areas were studied. The US Environmental Protection Agency (EPA) health risk assessment model was used to evaluate the health risks of VOCs emitted by the carbon industry. The results showed that the concentration of VOCs in the production areas of the three research enterprises was between 89.77-964.60 μg·m-3, and the management area was between 51.46-121.59 μg·m-3. Naphthalene and carbon disulfide were at the highest concentrations in the carbon plants. The ozone formation potential of VOCs in the production area was between 75.42-1416.73 μg·m-3, and in the management area was between 65.32-202.42 μg·m-3, mainly from the contribution of aromatic hydrocarbons and olefins. The carcinogenic health risk (Risk) of VOCs in the production area was 3.5×10-5-2.8×10-3, and in the management area was 2.0×10-5-9.4×10-5, which was higher than the maximum acceptable level recommended by the EPA (10-6). The non-carcinogenic health risk index (HI) of the VOCs in the production area was 3.2-1.4×102, and in the management area was 4.3×10-1-3.8, except for the management area of the first enterprise, which was greater than 1, which may expose the workers. These health factors cause cancer and non-carcinogenic hazards.
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Affiliation(s)
- Yi-Shun Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jia Wang
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Shi-Jie Han
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Dong He
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yong-Yang Chen
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Meng-Jie Jin
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qing-Yan Zhao
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qi-She Yan
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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15
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Lim HE, Ahn J, Han SJ, Shim J, Kim YH, Choi EK, Oh S, Shin SY, Lip GYH. P1026Risk factors for the occurrence of stroke after atrial fibrillation ablation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Risk factors for the occurrence of embolic stroke (ES) after atrial fibrillation (AF) ablation have not been fully elucidated. Our aim was to assess incidence of ES during long-term follow-up following AF ablation and to identify predicting factors associated with post-ablation ES.
Methods
We enrolled patients who experienced ES after AF ablation and body mass index-matched controls from AF ablation registries. Epicardial adipose tissue (EAT) was assessed using multislice computed tomography prior to ablation.
Results
A total of 3,464 patients who underwent AF ablation were recruited. During a mean follow-up of 47.2 months, ES occurred in 47 patients (1.36%) with a mean CHA2DS2-VAS score of 2.15 and overall incidence of ES was 0.34 per 100 patients/year. Compared with control group (n=190), ES group had more higher prior thromboembolic event and AF recurrence rates, larger LA size, lower creatinine clearance rate (CCr), and greater total and periatrial EAT volumes although no differences in AF type, CHA2DS2-VASc score, ablation extent, and anti-thrombotics use were found. On multivariate regression analysis, a prior history of thromboembolism, CCr, and periatrial EAT volume were independently associated with ES occurrence after AF ablation.
Cox regression analysis Risk factor Univariate Multivariate HR (95% CI) p value HR (95% CI) p value Age 1.017 (0.984–1.051) 0.31 Prior thromboembolism 2.488 (1.134–5.460) 0.023 2.916 (1.178–7.219) 0.021 CHA2DS2-VASc score 1.139 (0.899–1.445) 0.282 CCr 0.984 (0.970–0.999) 0.038 0.982 (0.996–0.998) 0.029 LA diameter (mm) 1.070 (1.012–1.130) 0.017 1.072 (0.999–1.150) 0.054 EAT_total (ml) 1.020 (1.010–1.029) <0.001 1.008 (0.993–1.023) 0.297 EAT_periatrial (ml) 1.085 (1.045–1.126) <0.001 1.065 (1.005–1.128) 0.032 PVI + additional ablation 0.846 (0.460–1.557) 0.592 No anticoagulant use 0.651 (0.346–1.226) 0.184 Recurrence 2.011 (1.007–4.013) 0.048 1.240 (0.551–2.793) 0.603 CCr, creatinine clearance rate; EAT, epicardial adipose tissue; LA, left atrium; PVI, pulmonary vein isolation.
K-M curve for stroke-free survival
Conclusions
Incidence of ES after AF ablation was lower than expected rate based on CHA2DS2-VASc score even though anticoagulants use was limited. Periatrial EAT volume, a prior thromboembolism event, and CCr were independent factors in predicting ES irrespective of AF recurrence and CHA2DS2-VASc score in patients who underwent AF ablation.
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Affiliation(s)
- H E Lim
- Hallym University Sacred Heart Hospital, Cardiology, Anyang-Si, Gyeonggi-Do, Korea (Republic of)
| | - J Ahn
- Pusan National University Hospital, Cardiology, Pusan, Korea (Republic of)
| | - S J Han
- Hallym University Sacred Heart Hospital, Cardiology, Anyang-Si, Gyeonggi-Do, Korea (Republic of)
| | - J Shim
- Korea University Anam Hospital, Cardiology, Seoul, Korea (Republic of)
| | - Y H Kim
- Korea University Anam Hospital, Cardiology, Seoul, Korea (Republic of)
| | - E K Choi
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - S Oh
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - S Y Shin
- Chung-Ang University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - G Y H Lip
- Liverpool Heart and Chest Hospital, Cardiovascular Science Centre, Liverpool, United Kingdom
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16
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Cui P, Li Y, Zhou CC, Zhou YH, Song CL, Qiu Q, Wang F, Guo C, Han SJ, Liang L, Yuan Y, Zeng MY, Yue J, Long L, Qin XH, Li Z, Chen XL, Zou YP, Cheng YB, Yu HJ. [Clinical analysis of 555 outpatients with hand, foot and mouth diseases caused by different enteroviruses]. Zhonghua Er Ke Za Zhi 2019; 57:445-451. [PMID: 31216802 DOI: 10.3760/cma.j.issn.0578-1310.2019.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the clinical characteristics of outpatients with hand, foot and mouth disease (HFMD) caused by different serotypes of enteroviruses. Methods: This was a prospective study. From February 2017 to March 2018, 563 outpatients with HFMD were enrolled by systematic sampling in the Department of Infectious Diseases, Henan Children's Hospital. Throat swabs were collected to determine the serotypes via PCR. Demographic, clinical, and laboratory data were collected by standard questionnaire. All cases were followed up twice at 2 and 9 weeks after the initial outpatient visit through telephone interview. A total of 563 cases were enrolled and 555 (98.6%) cases were positive for human enteroviruses, including 338 (60.9%) males. Analyses were stratified by enterovirus serotypes, Chi square test or Fisher's exact test, Rank sum test was used for comparison among different groups. Results: The age of 555 cases was 24.2 (16.4, 41.3) months. Among them 44.0% (224 cases) were identified as coxsackievirus (CV)-A6, while 189 cases, 35 cases, 14 cases and 73 cases were identified as CV-A16, enterovirus (EV)-A71, CV-A10 and other serotypes, respectively. Fever (≥37.5 ℃) was present in 51.4% (285/555) of laboratory confirmed cases. The proportions of fever in cases of CV-A6 (68.9%(168/244)) and CV-A10 (12/14) were significantly higher than those in cases of CV-A16 (31.7%(60/189),χ(2)=57.344,14.313,both P=0.000), other serotypes (43.8%(32/73),χ(2)=15.101 and 8.242, P=0.000 and 0.004) and EV-A71 (37.1%(13/35), χ(2)=13.506 and 9.441, P=0.000 and 0.002) respectively. There was no significant difference between CV-A6 and CV-A10 in presentation of fever (χ(2)=1.785, P=0.182). There were 359 cases (64.7%) with eruptions in mouth, hands, feet and buttocks. Cases infected with EV-A71 had the highest proportions (74.3%(26/35)) of rash emerging simultaneously in mouth, hands, feet, and buttocks. The proportion in cases of CV-A16, CV-A6, CVA10 and other serotype were 73.5% (139/189), 61.9% (151/244), 7/14 and 49.3% (36/73), respectively. The proportion of rash on other parts of body, such as face, limbs or torso in cases infected with CV-A6 (16.8% (41/244)) was the higherest and the proportion in cases of CV-A16, EV-A71, CV-A10 or other serotypes were 8.5% (16/189) , 5.7% (2/35) , 1/14, 6.8% (5/73) , respectively. None of these cases developed serious complications. Desquamation occurred in 45.5% (179/393) cases 7.5 (5.0, 9.0) days after disease onset and 13.5% (53/393) cases showed onychomadesis 31.0 (18.0, 33.5) days after disease onset. The proportion of desquamation and onychomadesis associated with CV-A6 (64.2% (95/148) and 31.8% (47/148)) was significantly higher than CV-A16 (31.8% (49/154) and 1.3% (2/154), χ(2)=33.601 and 52.482, both P=0.000) and other serotypes (38.0%(19/50) and 6.0%(3/50),χ(2)=10.236 and 12.988, P=0.001 and 0.000). Desquamation appeared more in cases of CV-A6 than in cases of CV-A10 (2/11,χ(2)=9.386, P=0.002), with the proportion of onychomadesis higher in CV-A6 than in EV-A71 (3.3% (1/30),χ(2)=11.088, P=0.001). Conclusion: Clinical manifestation such as fever, rash emerging parts, desquamation and onychomadesis are different among outpatient HFMD cases infected with CV-A16, CV-A6, EV-A71, CV-A10 and other enteroviruses.
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Affiliation(s)
- P Cui
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
| | - Y Li
- Key Laboratory of Surveillance and Early-warning on Infectious Disease, Division of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - C C Zhou
- Zhengzhou Children's Critical Medical Key Laboratory, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - Y H Zhou
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
| | - C L Song
- Zhengzhou Children's Critical Medical Key Laboratory, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - Q Qiu
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
| | - F Wang
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - C Guo
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - S J Han
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - L Liang
- West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Y Yuan
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - M Y Zeng
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
| | - J Yue
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - L Long
- West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - X H Qin
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - Z Li
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - X L Chen
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - Y P Zou
- Department of Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - Y B Cheng
- Zhengzhou Children's Critical Medical Key Laboratory, Children's Hospital Affiliated to Zhengzhou University, Children's Hospital of Henan Province, Zhengzhou 450003, China
| | - H J Yu
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
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17
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Yang LM, Wang SB, Hao Q, Han SJ, Li C, Zhao QY, Yan QS, Zhang RQ. [Characteristics and Source Analysis of Water-Soluble Ions in PM 2.5 in Zhengzhou]. Huan Jing Ke Xue 2019; 40:2977-2984. [PMID: 31854694 DOI: 10.13227/j.hjkx.201901137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In order to explore the pollution characteristics of water-soluble ions in PM2.5 in Zhengzhou, high time resolution and continuous observation of water-soluble inorganic ions in PM2.5 was conducted from December 1, 2017, to November 30, 2018, in Zhengzhou. The results showed that during the observation period, the average concentration of total water-soluble ions in Zhengzhou was 42.7 μg·m-3. The order of mass concentration of each ion, from large to small, was as follows:NO3-(17.7 μg·m-3), SO42-(10.2 μg·m-3), NH4+(9.0 μg·m-3), Cl-(2.3 μg·m-3), K+(1.3 μg·m-3), Na+(1.3 μg·m-3), Ca2+(0.8 μg·m-3), and Mg2+(0.1 μg·m-3). The mass concentration of total water-soluble ions was the highest in winter, slightly higher in autumn than in spring, and lowest in summer. The diurnal variation in single peak distribution was observed across the whole year in spring, summer, and autumn, while there was no significant diurnal variation in winter. The mass concentration of secondary inorganic ions (SO42-, NO3-, and NH4+) accounted for 43.8% of PM2.5, mainly in the form of (NH4)2SO4 and NH4NO3. There was a large degree of secondary transformation throughout the observation period; relative humidity had a significant influence on the sulfur oxidation rate, and temperature had a significant influence on the nitrogen oxidation rate. During the observation period, there was a good correlation between secondary ions, and K+ showed a good correlation with Mg2+ and Cl-. The main source of the secondary ions was the secondary conversion of gaseous pollutants. Mg2+ and Ca2+ were derived from soil dust and construction dust. K+ was one of the main biomarkers of biomass combustion. Na+ was mainly derived from sea salt and soil dust, and Cl- was derived not only from sea salt but also biomass and fossil fuel combustion. The results of principal component analysis showed that the water-soluble ions in PM2.5 in Zhengzhou were mainly affected by secondary transformation, combustion sources, and dust emission from soil or building construction.
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Affiliation(s)
- Liu-Ming Yang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Shen-Bo Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Qi Hao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Shi-Jie Han
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Chen Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Qing-Yan Zhao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Qi-She Yan
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China
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18
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Zhao QY, Han SJ, Zhang YS, Yang LM, Zhang RQ, Yan QS. [Emission Characteristics and List of Inorganic Elements in Fine Particles of Typical Industrial Kilns in Zhengzhou City]. Huan Jing Ke Xue 2019; 40:2052-2061. [PMID: 31087840 DOI: 10.13227/j.hjkx.201810109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Samples of particulate matter from flue gas emissions of typical brick, cement, and firebrick industrial kilns in Zhengzhou City were collected by dilution channel systems. Cr, Mn, Fe, Co, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Ni, Cu, Zn, Ga, As, Se, Sr, Cd, Sb, Sn, Ba, and Pb were analyzed. The emission factors (EFs) and emissions of inorganic elements of PM2.5 from kilns flue gases of three industries in Zhengzhou City during 2016 were calculated. A grid list of 1 km×1 km was also established. The results show that the highest concentration of total inorganic elements was in the firebrick industry, corresponding to(609.97±490.97) μg·m-3. The concentration of inorganic elements in the three industries accounted for 34%-54%, 27%-42%, and 23%-53% of PM2.5. The inorganic elements emitted from industrial kilns in brick and cement industries were mainly crust elements, and the highest concentration elements were Cl and Al. The inorganic elements emitted by industrial furnaces in the firebrick industry were mainly heavy metals, and the highest concentration element was Pb. The coefficient of divergence (CD) of inorganic elements in brick and cement industry was 0.389, that is slightly different. The CD between cement and refractory industry was 0.732, which represents a significant difference between inorganic element emissions. In 2016, the emissions of Pb, S, Zn, Cl, K, As, Fe, Si, Cr, Al, Na, and Ca in PM2.5 from major industrial furnaces in Zhengzhou City were 919.0, 793.1, 124.7, 378.6, 82.6, 12.2, 60.4, 145.4, 7.4, 86.6, 15.8, and 111.4 kg·a-1, respectively. Heavy metal emission in the Xinmi area was the highest, representing a high health risk.
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Affiliation(s)
- Qing-Yan Zhao
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Shi-Jie Han
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yi-Shun Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Liu-Ming Yang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qi-She Yan
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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19
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Wang AY, Han SJ, Zhang JH, Wang M, Yin XH, Fang LD, Yang D, Hao GY. The interaction between nonstructural carbohydrate reserves and xylem hydraulics in Korean pine trees across an altitudinal gradient. Tree Physiol 2018; 38:1792-1804. [PMID: 30376119 DOI: 10.1093/treephys/tpy119] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 10/05/2018] [Indexed: 05/23/2023]
Abstract
Nonstructural carbohydrates (NSC) have been proposed to play an important role in maintaining the hydraulic integrity of trees, particularly in environments with high risks of embolism formation, but knowledge about the interaction between NSC reserves and xylem hydraulics is still very limited. We studied the variation of NSC reserves and hydraulic traits in Pinus koraiensis Sieb. et Zucc. (Korean pine) in March and June across a relatively large altitudinal gradient in Changbai Mountain of Northeast China. One of the major aims was to investigate the potential role NSC plays in maintaining hydraulic integrity of overwintering stems in facing freezing-induced embolism. Consistent with our hypotheses, substantial variations in both NSC contents and hydraulic traits were observed across altitudes and between the two seasons. In March, when relatively high degrees of winter embolism exist, the percentage loss of conductivity (PLC) showed an exponential increase with altitude. Most notably, positive correlations between branch and trunk soluble sugar content and PLC (P = 0.053 and 0.006) were observed across altitudes during this period. These correlations could indicate that more soluble sugars are required for maintaining stem hydraulic integrity over the winter by resisting or refilling freezing-induced embolism in harsher environments, although more work is needed to establish a direct causal relationship between NSC dynamics and xylem hydraulics. If the correlation is indeed directly associated with varying demands for maintaining hydraulic integrity across environmental gradients, greater carbon demands may compromise tree growth under conditions of higher risk of winter embolism leading to a trade-off between competitiveness and stress resistance, which may be at least partially responsible for the lower dominance of Korean pine trees at higher altitudes.
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Affiliation(s)
- Ai-Ying Wang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Shi-Jie Han
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
- School of Life Science, Henan University, Kaifeng, China
| | - Jun-Hui Zhang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Miao Wang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Xiao-Han Yin
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Li-Dong Fang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Da Yang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Guang-You Hao
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
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20
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Zhao QY, Jiang N, Yan QS, Wang SB, Han SJ, Yang LM, Zhang RQ. [Size Distribution Characteristics of Water-Soluble Inorganic Ions During Summer and Autumn in Zhengzhou]. Huan Jing Ke Xue 2018; 39:4866-4875. [PMID: 30628207 DOI: 10.13227/j.hjkx.201803102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To study the compositional characteristics of atmospheric particulates with different particle sizes in the central city of Zhengzhou, China, a Tisch graded impact sampler was used to sample atmospheric particulates in summer and autumn. The mass concentrations of water-soluble inorganic ions, including anions (Cl-, F-, NO3-, and SO42-) and cations (Na+, Ca2+, NH4+, K+, and Mg2+) were measured by ion chromatography, and the online ion chromatography-based analyzer MARGA monitored the real-time concentration of particulate nitrate. The results showed that the average concentration of water-soluble ions in Zhengzhou City was (70.9±52.1) μg·m-3 during the sampling period, and the order of water-soluble ion mass concentrations was NO3- > SO42- > NH4+ > Ca2+ > Na+ > Cl- > Mg2+ > K+ > F-; NO3-, SO42-, and NH4+ accounted for 79.9% of total water-soluble ions. The NO3- concentration was mainly concentrated in the 0.65-3.3 μm particle size segment, despite the SO42- concentration being concentrated in the ≤ 1.1 μm particle size segment in autumn or summer. Both NO3- and SO42- had a bimodal distribution in summer and autumn and were mainly distributed as fine particles. NH4+ showed seasonal variation with a bimodal distribution in summer and a unimodal distribution in autumn. Zhengzhou City had serious ozone pollution in summer, and O3 and NO3- showed the "staggered peak" phenomenon, indicating photochemical reactions in the atmosphere. In autumn, water-soluble inorganic ion concentration in particulate matter was high, and the ratio of[NO3-]/[SO42-] was higher than 0.5. The mobile source is an important source of particles. NOR and SOR peaks were on the 1.1-2.1 μm particle size segment in summer, whereas those in the 0.65-1.1 μm particle size segment occurred in autumn. The sulfur gas-to-grain conversion in summer was larger than that of nitrogen, contrary to the result in autumn.
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Affiliation(s)
- Qing-Yan Zhao
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Nan Jiang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qi-She Yan
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Shen-Bo Wang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Shi-Jie Han
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Liu-Ming Yang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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21
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Kim EY, Joo SW, Han SJ, Kim MJ, Choi SY. Depression, Impulse Control Disorder, and Life Style According to Smartphone Addiction. Stud Health Technol Inform 2017; 245:1272. [PMID: 29295357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We examined depression, impulse control disorder, and life style by degree of smartphone addiction. Chi-square tests and ANOVA were used to identify significant variables. CART was used to generate a decision making diagram of variables affecting smartphone addiction. The severe smartphone addiction group had rates of depression and impulse control disorder than the initial smartphone group.
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Affiliation(s)
- E Y Kim
- Department of Health Care Administration, Seoyoung University, Paju-si, Gyeonggi-do, Republic of Korea
| | - S W Joo
- ACE Hospital, Ansan-si, Gyeonggi-do, Republic of Korea
| | - S J Han
- Department of Health Care Administration, Seoyoung University, Paju-si, Gyeonggi-do, Republic of Korea
| | - M J Kim
- Department of Health Care Administration, Seoyoung University, Paju-si, Gyeonggi-do, Republic of Korea
| | - S Y Choi
- Department of Health Care Administration, Seoyoung University, Paju-si, Gyeonggi-do, Republic of Korea
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22
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Wang AY, Wang M, Yang D, Song J, Zhang WW, Han SJ, Hao GY. Responses of hydraulics at the whole-plant level to simulated nitrogen deposition of different levels in Fraxinus mandshurica. Tree Physiol 2016; 36:1045-1055. [PMID: 27259635 DOI: 10.1093/treephys/tpw048] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/04/2016] [Indexed: 06/05/2023]
Abstract
Nitrogen (N) deposition is expected to have great impact on forest ecosystems by affecting many aspects of plant-environmental interactions, one of which involves its influences on plant water relations through modifications of plant hydraulic architecture. However, there is a surprising lack of integrative study on tree hydraulic architecture responses to N deposition, especially at the whole-plant level. In the present study, we used a 5-year N addition experiment to simulate the effects of six different levels of N deposition (20-120 kg ha(-1) year(-1)) on growth and whole-plant hydraulic conductance of a dominant tree species (Fraxinus mandshurica Rupr.) from the typical temperate forest of NE China. The results showed that alleviation of N limitation by moderate concentrations of fertilization (20-80 kg ha(-1) year(-1)) promoted plant growth, but further N additions on top of the threshold level showed negative effects on plant growth. Growth responses of F. mandshurica seedlings to N addition of different concentrations were accompanied by corresponding changes in whole-plant hydraulic conductance; higher growth rate was accompanied by reduced whole-plant hydraulic conductance (Kplant) and higher leaf water-use efficiency. A detailed analysis on hydraulic conductance of different components of the whole-plant water transport pathway revealed that changes in root and leaf hydraulic conductance, rather than that of the stem, were responsible for Kplant responses to N fertilization. Both plant growth and hydraulic architecture responses to increasing levels of N addition were not linear, i.e., the correlation between measured parameters and N availability exhibited bell-shaped curves with peak values observed at medium levels of N fertilization. Changes in hydraulic architecture in response to fertilization found in the present study may represent an important underlying mechanism for the commonly observed changes in water-related tree performances in response to N deposition.
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Affiliation(s)
- Ai-Ying Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Miao Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China
| | - Da Yang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jia Song
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei-Wei Zhang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China
| | - Shi-Jie Han
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China
| | - Guang-You Hao
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110010, China
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23
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Wang NG, Wang F, Tan BY, Han SJ, Dong J, Yuan ZN, Wang DC. Genetic analysis of TNFST15 variants in ankylosing spondylitis. Int J Clin Exp Pathol 2015; 8:15210-15215. [PMID: 26823868 PMCID: PMC4713654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/19/2015] [Indexed: 06/05/2023]
Abstract
AIMS The purpose of this study was to explore the role of TNF-like ligand 1A (TL1A) gene (TNFST15) polymorphisms (rs3810936, rs7848647, and rs6478109) in the generation of ankylosing spondylitis (AS). METHODS Polymerase chain reaction (PCR) and sequencing were used to conduct the genotyping of TNFSF15 polymorphisms in 113 AS patients and 120 healthy persons as the case and control groups. The frequencies comparison was performed by chi-square or t test between the two groups. Odds ratio (OR) and 95% confidence interval (95% CI) were calculated to represent the correlation between TNFSF15 polymorphism and AS. Besides, genotypes distribution of the former in controls was checked by Hardy-Weinberg equilibrium (HWE). RESULTS There was statistically significant difference in AS patients and controls based on family history. Among TNFSF15 polymorphisms, only TT genotype frequency of rs3810936 in cases was obviously high, compared with the controls (P=0.04), the results indicated that TT was a high-risk genotype (OR=2.31, 95% CI=1.03-5.20). However, both of rs6478109, rs7848647 polymorphisms didn't show any association with AS. CONCLUSION Rs3810936 of TNFSF15 were related to the risk of AS and we should pay more attention to the role of TNFSF15 polymorphisms in the pathogenesis of AS in the future.
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Affiliation(s)
- Nai-Guo Wang
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
| | - Feng Wang
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
| | - Bing-Yi Tan
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
| | - Shi-Jie Han
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
| | - Jun Dong
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
| | - Ze-Nong Yuan
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
| | - Da-Chuan Wang
- Department of Spinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University Jinan 250021, Shandong, China
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24
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Han SJ, Min HJ, Yoon SC, Ko EA, Park SJ, Yoon JH, Shin JS, Seo KY. HMGB1 in the pathogenesis of ultraviolet-induced ocular surface inflammation. Cell Death Dis 2015; 6:e1863. [PMID: 26313914 PMCID: PMC4558494 DOI: 10.1038/cddis.2015.199] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 05/27/2015] [Accepted: 06/16/2015] [Indexed: 01/19/2023]
Abstract
High-mobility group box 1 (HMGB1) functions as a transcription-enhancing nuclear protein as well as a crucial cytokine that regulates inflammation. This study demonstrated that secretion of HMGB1 due to ultraviolet (UV) radiation inducing ocular surface inflammation-mediated reactive oxygen species (ROS) production. After treating conjunctival epithelial cells with UV radiation, HMGB1 was translocated from the nucleus to the cytoplasm and then eventually to the extracellular space. HMGB1 played a crucial role in UV-induced conjunctival neutrophil infiltration, which subsided when mice were pretreated with the HMGB1 inhibitors soluble receptor for advanced glycation endproducts (sRAGEs) and HMGB1 A box protein. In case of using ROS quencher, there was decrease in UV-induced HMGB1 secretion in conjunctival epithelial cells and mice. Considering that UV-induced chronic inflammation causes ocular surface change as pterygium, we have confirmed high HMGB1 translocation and ROS expression in human pterygium. Our findings therefore revealed a previously unknown mechanism of UV-induced ocular inflammation related to ROS and HMGB1 suggesting a new medical therapeutic target.
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Affiliation(s)
- S J Han
- Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - H J Min
- Department of Otorhinolaryngology - Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea.,Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - S C Yoon
- Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - E A Ko
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea
| | - S J Park
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Yoon
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.,Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - J-S Shin
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea.,Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - K Y Seo
- Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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25
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Sui X, Feng FJ, Zhao D, Xing M, Sun XY, Han SJ, Li MH. Mating system patterns of natural populations of Pinus koraiensis along its post-glacial colonization route in northeastern China. Genet Mol Res 2015; 14:4113-24. [PMID: 25966183 DOI: 10.4238/2015.april.27.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To understand the genetic mechanisms underlying the endangerment of Pinus koraiensis, we studied the mating system of 49 families of this species in 3 natural populations along its post-glacial colonization route across ~1500 km in northeastern China using the chloroplast simple sequence repeat technique. We analyzed 11 polymorphic loci with clear and repeating bands, and we calculated the multi-locus outcrossing rate (tm), single-locus outcrossing rate, inbreeding index, and fixation index (F). Intra-population variation was not observed, but a large inter-population variation was observed in the outcrossing rate, and the tm increased from 0.767 (the south population) to 0.962 (the north population) along the post-glacial colonization route. The tm values within a population did not change with time over 2 consecutive years. The F values for the 3 populations were <0, which indicates an excess of heterozygotes. The mean effective number of alleles, Shannon diversity index, and Nei's genetic diversity index did not show a south-north pattern. The north population had the highest outcrossing rate but the lowest genetic diversity. The average genetic differentiation of P. koraiensis populations was 0.1251, which was within the average range of woody plants with outcrossing and wind pollination. This study suggests that the current endangerment of P. koraiensis is not related to its genetic structure; perhaps it is mainly caused by man-made and natural disturbances such as deforestation and fire. Therefore, reducing disturbances and enhancing habitats, rather than the genetic aspects, play more important roles in the long-term protection of P. koraiensis.
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Affiliation(s)
- X Sui
- Northeast Forestry University, Harbin, China
| | - F J Feng
- Northeast Forestry University, Harbin, China
| | - D Zhao
- Northeast Forestry University, Harbin, China
| | - M Xing
- Northeast Forestry University, Harbin, China
| | - X Y Sun
- Northeast Forestry University, Harbin, China
| | - S J Han
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - M H Li
- Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
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Choi YJ, Choi SE, Ha ES, Kang Y, Han SJ, Kim DJ, Lee KW, Kim HJ. Extracellular visfatin activates gluconeogenesis in HepG2 cells through the classical PKA/CREB-dependent pathway. Horm Metab Res 2014; 46:233-9. [PMID: 24627100 DOI: 10.1055/s-0034-1370907] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Adipokines reportedly affect hepatic gluconeogenesis, and the adipokine visfatin is known to be related to insulin resistance and type 2 diabetes. However, whether visfatin contributes to hepatic gluconeogenesis remains unclear. Visfatin, also known as nicotinamide phosphoribosyltransferase (NAMPT), modulates sirtuin1 (SIRT1) through the regulation of nicotinamide adenine dinucleotide (NAD). Therefore, we investigated the effect of extracellular visfatin on glucose production in HepG2 cells, and evaluated whether extracellular visfatin affects hepatic gluconeogenesis via an NAD+-SIRT1-dependent pathway. Treatment with visfatin significantly increased glucose production and the mRNA expression and protein levels of phosphoenolpyruvate carboxykinase (PEPCK) and glucose-6-phosphatase (G6Pase) in HepG2 cells in a time- and concentration-dependent manner. Knockdown of SIRT1 had no remarkable effect on the induction of gluconeogenesis by visfatin. Subsequently, we evaluated if extracellular visfatin stimulates the production of gluconeogenic enzymes through the classical protein kinase A (PKA)/cyclic AMP-responsive element (CRE)-binding protein (CREB)-dependent process. The phosphorylation of CREB and PKA increased significantly in HepG2 cells treated with visfatin. Additionally, knockdown of CREB and PKA inhibited visfatin-induced gluconeogenesis in HepG2 cells. In summary, extracellular visfatin modulates glucose production in HepG2 cells through the PKA/CREB pathway, rather than via SIRT1 signaling.
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Affiliation(s)
- Y J Choi
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
| | - S-E Choi
- Department of Physiology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - E S Ha
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Y Kang
- Department of Physiology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - S J Han
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
| | - D J Kim
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
| | - K W Lee
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
| | - H J Kim
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
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Chik TK, Ma XY, Choy TH, Li YY, Diao HJ, Teng WK, Han SJ, Cheung KMC, Chan BP. Photochemically crosslinked collagen annulus plug: a potential solution solving the leakage problem of cell-based therapies for disc degeneration. Acta Biomater 2013; 9:8128-39. [PMID: 23751592 DOI: 10.1016/j.actbio.2013.05.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/25/2013] [Accepted: 05/30/2013] [Indexed: 12/18/2022]
Abstract
Intra-disc injection of mesenchymal stem cells (MSCs) to treat disc degeneration may lead to unfavorable complications, particularly osteophyte formation. Development of an effective method to block the injection portal, prevent the leakage of injected cells and materials and, hence, prevent osteophyte formation is of the utmost importance before MSC-based therapies can be applied in a clinical setting. Here we seek to alleviate the cell leakage problem and the associated complication osteophyte formation by developing an injectable annulus plug to block the injection portal during intra-disc delivery. Specifically, we fabricated a needle-shaped collagen plug by photochemical crosslinking and successfully delivered it intra-discally, in association with MSCs in collagen microsphere carriers, using a custom-made delivery device. The mechanical performance of the plug and its effectiveness in reducing cell leakage were evaluated ex vivo under compression and in torsion push-out tests. The results demonstrate that the plug survived physiologically relevant loadings and significantly reduced leakage and enhanced retention of the injected materials. Finally, a pilot in vivo study in rabbits was conducted to evaluate the performance of the plug. Microcomputed tomography imaging and histology revealed that the plug significantly reduced osteophyte formation. This work suggests the potential of the annulus plug as an adjunct or annulus closure device for intra-disc delivery of cells and materials.
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Affiliation(s)
- T K Chik
- Tissue Engineering Laboratory, Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong Special Administrative Region
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Chen CM, Han SJ, Yuan SS, Wang CJ, Yu JH. Isolation and characterization of 20 polymorphic microsatellite markers for Juglans mandshurica (Juglandaceae). Appl Plant Sci 2013; 1:apps1200009. [PMID: 25202563 PMCID: PMC4103126 DOI: 10.3732/apps.1200009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 01/26/2013] [Indexed: 05/14/2023]
Abstract
PREMISE OF THE STUDY Fifty microsatellite loci were developed for the endangered species Juglans mandshurica to investigate its genetic diversity and population structure. • METHODS AND RESULTS In all, 50 microsatellite markers were isolated from J. mandshurica, using the Fast Isolation by AFLP of Sequences COntaining repeats (FIASCO) protocol. Twenty of these polymorphic markers were assessed in samples collected from 98 individuals among five populations in northeastern China. Across all of the J. mandshurica samples, the number of alleles per locus ranged from one to 17. • CONCLUSIONS These new microsatellite loci will be useful for conservation genetics studies of J. mandshurica.
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Affiliation(s)
- Chang-Mei Chen
- State Engineering Laboratory of Bio-Resource Eco-Utilization (Heilongjiang), Northeast Forestry University, Harbin 150040, People’s Republic of China
| | - Shi-Jie Han
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, People’s Republic of China
| | - Shu-Sheng Yuan
- State Engineering Laboratory of Bio-Resource Eco-Utilization (Heilongjiang), Northeast Forestry University, Harbin 150040, People’s Republic of China
| | - Chun-Jing Wang
- State Engineering Laboratory of Bio-Resource Eco-Utilization (Heilongjiang), Northeast Forestry University, Harbin 150040, People’s Republic of China
| | - Jing-Hua Yu
- State Engineering Laboratory of Bio-Resource Eco-Utilization (Heilongjiang), Northeast Forestry University, Harbin 150040, People’s Republic of China
- Author for correspondence:
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Wang NN, Yang X, Li SL, Sui X, Han SJ, Feng FJ. [Effects of precipitation variation on the distribution pattern of soil fungal diversity in broad-leaved Korean pine mixed forest]. Ying Yong Sheng Tai Xue Bao 2013; 24:1985-1990. [PMID: 24175531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Broad-leaved Korean pine mixed forest is a kind of zonal climax vegetation with ecological significance in Northeast China, whereas Changbai Mountain is an ideal area to study the effects of precipitation variation on temperate forest. Taking the virgin broad-leaved Korean pine mixed forest in Changbai Mountain as the object, and based on T-RFLP method, this paper analyzed the spatial heterogeneity of fungal diversity in 0-5 cm and 5-10 cm soil layers and in rhizosphere soil at three different precipitation plots (30% increase, 30% decrease, and the control). Both the increase and the decrease of precipitation increased the diversity of soil fungi, but the dominant population changed. In 0-5 cm and 5-10 cm soil layers, the T-RFs over 500 bp increased with precipitation; in rhizosphere soil, the T-RFs responded to precipitation variation were 380 bp, 455 bp, and 487 bp, and the response mode was more complicated than that in surface soil layers. The results of CCA showed that the fungal community composition was significantly affected by soil pH, organic carbon, total nitrogen, and organic phosphorus.
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Affiliation(s)
- Nan-Nan Wang
- Northeast Forestry University, Harbin 150040, China.
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Yu JH, Chen CM, Han SJ, Guo XR, Yuan SS, Wang CJ, Zu YG. Development and characterization of polymorphic microsatellite loci in Phellodendron amurense (Rutaceae). Appl Plant Sci 2013; 1:apps1200321. [PMID: 25202527 PMCID: PMC4105284 DOI: 10.3732/apps.1200321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Accepted: 09/03/2012] [Indexed: 06/03/2023]
Abstract
PREMISE OF THE STUDY Microsatellite markers were developed for the rare species Phellodendron amurense to assess the genetic diversity and population structure of this plant. • METHODS AND RESULTS In total, 27 microsatellite markers were developed for P. amurense by using an enriched genomic library and hybridization; all of these primers successfully amplified DNA fragments in P. amurense. These markers were screened in 74 individuals from four populations in China; 15 loci were found to be polymorphic, with the number of alleles per locus ranging from one to nine. • CONCLUSIONS The microsatellite markers developed here represent a useful tool for studying the population genetic structure of P. amurense and to inform toward the development of effective conservation programs for this species.
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Affiliation(s)
- Jing-Hua Yu
- State Engineering Laboratory of Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, Heilongjiang, People’s Republic of China
| | - Chang-Mei Chen
- State Engineering Laboratory of Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, Heilongjiang, People’s Republic of China
| | - Shi-Jie Han
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, People’s Republic of China
| | - Xiao-Rui Guo
- State Engineering Laboratory of Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, Heilongjiang, People’s Republic of China
| | - Shu-Sheng Yuan
- State Engineering Laboratory of Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, Heilongjiang, People’s Republic of China
| | - Chun-Jing Wang
- State Engineering Laboratory of Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, Heilongjiang, People’s Republic of China
| | - Yuan-Gang Zu
- State Engineering Laboratory of Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, Heilongjiang, People’s Republic of China
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Yan CF, Han SJ, Zhou YM, Wang CG, Dai GH, Xiao WF, Li MH. Needle-age related variability in nitrogen, mobile carbohydrates, and δ13C within Pinus koraiensis tree crowns. PLoS One 2012; 7:e35076. [PMID: 22493732 PMCID: PMC3320863 DOI: 10.1371/journal.pone.0035076] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Accepted: 03/12/2012] [Indexed: 11/19/2022] Open
Abstract
For both ecologists and physiologists, foliar physioecology as a function of spatially and temporally variable environmental factors such as sunlight exposure within a tree crown is important for understanding whole tree physiology and for predicting ecosystem carbon balance and productivity. Hence, we studied concentrations of nitrogen (N), non-structural carbohydrates (NSC = soluble sugars + starch), and δ(13)C in different-aged needles within Pinus koraiensis tree crowns, to understand the needle age- and crown position-related physiology, in order to test the hypothesis that concentrations of N, NSC, and δ(13)C are needle-age and crown position dependent (more light, more photosynthesis affecting N, NSC, and δ(13)C), and to develop an accurate sampling strategy. The present study indicated that the 1-yr-old needles had significantly higher concentration levels of mobile carbohydrates (both on a mass and an area basis) and N(area) (on an area basis), as well as NSC-N ratios, but significantly lower levels of N(mass) (on a mass basis) concentration and specific leaf area (SLA), compared to the current-year needles. Azimuthal (south-facing vs. north-facing crown side) effects were found to be significant on starch [both on a mass (ST(mass)) and an area basis (ST(area))], δ(13)C values, and N(area), with higher levels in needles on the S-facing crown side than the N-facing crown side. Needle N(mass) concentrations significantly decreased but needle ST(mass), ST(area), and δ(13)C values significantly increased with increasing vertical crown levels. Our results suggest that the sun-exposed crown position related to photosynthetic activity and water availability affects starch accumulation and carbon isotope discrimination. Needle age associated with physiological activity plays an important role in determining carbon and nitrogen physiology. The present study indicates that across-scale sampling needs to carefully select tissue samples with equal age from a comparable crown position.
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Affiliation(s)
- Cai-Feng Yan
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
- Graduate University of Chinese Academy of Sciences, Beijing, China
| | - Shi-Jie Han
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Yu-Mei Zhou
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Cun-Guo Wang
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
- Graduate University of Chinese Academy of Sciences, Beijing, China
| | - Guan-Hua Dai
- Research Station of Changbai Moutain Forest Ecosystems, Chinese Academy of Sciences, Erdaobaihe, China
| | - Wen-Fa Xiao
- Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Chinese Academy of Forestry, Beijing, China
| | - Mai-He Li
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
- Tree Physioecology, Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
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32
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Zhang FM, Ju WM, Chen JM, Wang SQ, Yu GR, Han SJ. [Characteristics of terrestrial ecosystem primary productivity in East Asia based on remote sensing and process-based model]. Ying Yong Sheng Tai Xue Bao 2012; 23:307-318. [PMID: 22586952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Based on the bi-linearly interpolated meteorological reanalysis data from National Centers for Environmental Prediction, USA and by using the leaf area index data derived from the GIMMS NDVI to run the process-based Boreal Ecosystems Productivity Simulator (BEPS) model, this paper simulated and analyzed the spatiotemporal characteristics of the terrestrial ecosystem gross primary productivity (GPP) and net primary productivity (NPP) in East Asia in 2000-2005. Before regional simulating and calculating, the observation GPP data of different terrestrial ecosystem in 15 experimental stations of AsiaFlux network and the inventory measurements of NPP at 1300 sampling sites were applied to validate the BEPS GPP and NPP. The results showed that BEPS could well simulate the changes in GPP and NPP of different terrestrial ecosystems, with the R2 ranging from 0.86 to 0.99 and the root mean square error (RMSE) from 0.2 to 1.2 g C x m(-2) x d(-1). The simulated values by BEPS could explain 78% of the changes in annual NPP, and the RMSE was 118 g C x m(-2) x a(-1). In 2000-2005, the averaged total GPP and total NPP of the terrestrial ecosystems in East Asia were 21.7 and 10.5 Pg C x a(-1), respectively, and the GPP and NPP exhibited similar spatial and temporal variation patterns. During the six years, the total NPP of the terrestrial ecosystems varied from 10.2 to 10.7 Pg C x a(-1), with a coefficient of variation being 2. 2%. High NPP (above 1000 g C x m(-2) x a(-1)) occurred in the southeast island countries, while low NPP (below 30 g C x m(-2) x a(-1)) occurred in the desert area of Northwest China. The spatial patterns of NPP were mainly attributed to the differences in the climatic variables across East Asia. The NPP per capita also varied greatly among different countries, which was the highest (70217 kg C x a(-1)) in Mongolia, far higher than that (1921 kg C x a(-1)) in China, and the lowest (757 kg C x a(-1)) in India.
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Affiliation(s)
- Fang-Min Zhang
- College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China.
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Zhu ZL, Sun XM, Yu GR, Wen XF, Zhang YP, Han SJ, Yan JH, Wang HM. [Radiometers performance attenuation and data correction in long-term observation of total radiation and photosynthetically active radiation in typical forest ecosystems in China]. Ying Yong Sheng Tai Xue Bao 2011; 22:2954-2962. [PMID: 22303674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Based on the total radiation and photosynthetically active radiation (PAR) observations with net radiometer (CNR1) and quantum sensor (Li-190SB) in 4 ChinaFLUX forest sites (Changbaishan, Qianyanzhou, Dinghushan, and Xishuangbanna) in 2003-2008, this paper analyzed the uncertainties and the radiometers performance changes in long-term and continuous field observation. The results showed that the 98% accuracy of the total radiation measured with CNR1 (Q(cNR1)) could satisfy the technical criterion for the sites except Xishuangbanna where the Q(CNR1) was averagely about 7% lower than Q(CM11), the radiation measured with high accuracy pyranometer CM11. For most sites, though the temperature had definite effects on the performance of CNR1, the effects were still within the allowable range of the accuracy of the instrument. Besides temperature, the seasonal fog often occurred in tropical rain forests in Xishuangbanna also had effects on the performance of CNR1. Based on the long-term variations of PAR, especially its ratio to total radiation in the 4 sites, it was found that quantum sensor (Li-190SB) had obvious performance attenuation, with the mean annual attenuation rate being about 4%. To correct the observation error caused by Li-190SB, an attempt was made to give a post-correction of the PAR observations, which could basically eliminate the quantum sensor's performance attenuation due to long-term field measurement.
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Affiliation(s)
- Zhi-Lin Zhu
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Sung TY, Kang WS, Han SJ, Kim JS, Chee HK, Shin JK, Kim SH. Does Near-Infrared Spectroscopy Provide an Early Warning of Low Haematocrit following the Initiation of Hypothermic Cardiopulmonary Bypass in Cardiac Surgery? J Int Med Res 2011; 39:1497-503. [DOI: 10.1177/147323001103900439] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study investigated 151 patients undergoing cardiac surgery to determine whether measurement of regional cerebral oxygen saturation (rScO2) using near-infrared spectroscopy (NIRS) can indicate a low haematocrit after initiation of hypothermic cardiopulmonary bypass (CPB). Haematocrit, rScO2, haemoglobin level, arterial partial pressures of carbon dioxide and oxygen, systemic blood pressure, and nasopharyngeal and rectal temperatures were determined 5 min after the initial administration of heparin for CPB and 90 s after completion of the first cardioplegic solution injection. Immediately after initiation of hypothermic CPB, rScO2, haemoglobin and haematocrit values were significantly lower than those before CPB. No significant correlations were found between the change in haematocrit and changes in left, right and mean rScO2; thus, changes in rScO2 before and after initiation of hypothermic CPB did not reflect changes in haematocrit values. This indicates that NIRS cannot provide early warning of a low haematocrit immediately after initiation of hypothermic CPB in cardiac surgery.
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Affiliation(s)
- TY Sung
- Department of Anaesthesiology and Pain Medicine, Konyang University Hospital, Daejeon, Republic of Korea
| | - WS Kang
- Department of Anaesthesiology and Pain Medicine, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - SJ Han
- Department of Anaesthesiology and Pain Medicine, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - JS Kim
- Department of Cardiovascular and Thoracic Surgery, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - HK Chee
- Department of Cardiovascular and Thoracic Surgery, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - JK Shin
- Department of Cardiovascular and Thoracic Surgery, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - SH Kim
- Department of Anaesthesiology and Pain Medicine, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Republic of Korea
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Sohn YB, Ki CS, Kim CH, Ko AR, Yook YJ, Lee SJ, Kim SJ, Park SW, Yeau S, Kwon EK, Han SJ, Choi EW, Lee SY, Kim JW, Jin DK. Identification of 11 novel mutations in 49 Korean patients with mucopolysaccharidosis type II. Clin Genet 2011; 81:185-90. [PMID: 21291454 DOI: 10.1111/j.1399-0004.2011.01641.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mucopolysaccharidosis type II (MPS II) or Hunter syndrome is a rare lysosomal storage disorder caused by a deficiency of iduronate-2-sulfatase (IDS). As MPS II is X-linked, patients are usually males with heterogeneous mutations ranging from point mutations to gross deletions and recombination. In 2003, we reported a mutation analysis of 25 patients with MPS II. In this study, 31 mutations in another 49 Korean patients (45 families) with MPS II are reported: 12 missense, nine deletions, four splicing, two nonsense, two insertions, one deletion/insertion, and IDS-IDS2 recombination mutations. Among these mutations, 11 were novel ones (4 missense mutations: Ser61Pro, Pro97Arg, Pro228Ala, and Pro261Ala; 5 deletions: c.344delA, c.420delG, c.768delT, c.1112delC and c.1402delC; 1 deletion/insertion: c.1222delinsTA; and 1 insertion mutation: c.359_360insATCC). The IDS-IDS2 recombination mutations were most frequently observed; all patients with this mutation had the severe MPS II phenotype. However, most of the patients (5/7) with the G374G splicing mutation had an attenuated phenotype, except for two sibling cases with the severe phenotype. Except for a few recurrent mutations such as the G374G, R443X, L522P, and recombination mutations, each patient had a unique individual mutation. Therefore, careful interpretation of genotype-phenotype correlations is warranted.
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Affiliation(s)
- Y B Sohn
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
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Han SJ, Zhang JG, Qiu GX, Wang NG, Zhu Y, Wu ZH, Zhao LJ. [Clinical results of posterolateral fusion in treating lumbar low-grade spondylolisthesis]. Zhonghua Wai Ke Za Zhi 2011; 49:119-24. [PMID: 21426825 DOI: 10.3760/cma.j.issn.0529-5815.2011.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To analyze the clinical outcomes and losses of correction for posterolateral fusion on low-grade lumbar spondylolisthesis. METHODS From October 2001 to July 2008, 37 patients with a mean age of 60.1 years (range, 27 - 88 years) with low-grade lumbar spondylolisthesis treated with posterolateral fusion, including 9 males and 28 females, were reviewed retrospectively. The clinical outcomes were evaluated using the visual analogue scale (VAS) and Oswestry disability index (ODI). The fusion status and loss of correction were assessed using plain radiographs and CT. RESULTS All the 37 patients had got complete follow-up for 14 - 96 months (average 36.4 months); post-operative reduction rate was 76.4%, and 34 patients (91.9%) showed loss of correction with a mean loss rate 5.8% (range, -3.0% - 25.8%). The percentage of slip of pre-operative, post-operative and final follow-up indicated significant difference (P < 0.05)compared with each other; post-operative intervertebral disc height indicated significant difference in comparison with that of pre-operatively and at final follow-up (P < 0.05); lumbar lordosis angle at final follow-up showed significant difference when compared with that of pre-operatively and postoperatively (P < 0.05); VAS and ODI at final follow-up indicated significant difference in contrast to that of pre-operative (P < 0.05). Upon final follow-up, the complications were found in 2 cases who presented degenerative scoliosis at 15 and 17 months after the surgery, in 1 case with cranial adjacent segment retrolisthesis at the 14 months after the surgery, in 1 case with cut-out and breakage of screws at the 24 months after the surgery, and in 1 case with postoperative infection which were cured after debridement. CONCLUSIONS For mid-term follow-up of low-grade lumbar spondylolisthesis, posterolateral fusion shows loss of correction in most cases, but presents good clinical outcome and fusion rate.
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Affiliation(s)
- Shi-Jie Han
- Orthopaedic Department, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
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Wang ST, Han SJ, Zhang JH, Wang CG, Xu Y, Li XF, Wang SQ. [Woody plant fine root biomass and its spatial distribution in top soil of broad-leaved Korean pine forest in Changbai Mountain]. Ying Yong Sheng Tai Xue Bao 2010; 21:583-589. [PMID: 20560311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Geostatistic method was applied to study the spatial distribution of woody plant fine root biomass in a natural broad-leaved Korean pine (Pinus koraiensis) mixed forest soil in Changbai Mountain. The investigation was carried out in three selected plots, sized 50 m x 50 m, in 2008. In the three plots, the living fine root biomass in surface soil (0-20 cm) was 3.195, 1.930, and 2.085 t x hm(-2), and the dead fine root biomass was 0.971 0.581, and 0.790 t x hm(-2), respectively. In 0-10 cm soil layer, the living fine root biomass had no correlation with the dead fine root biomass; but in 10-20 cm soil layer, a significant positive correlation was found between them (r = 0.352, P < 0.05). The variograms of living fine root biomass and dead fine root biomass could be well fitted by spherical model. Spatial variation explained more than 70% of the total variance of fine root biomass across three plots. The regressed ranges were 5.2, 14. 6, and 9.8 m for living fine root biomass, and 4.3, 20.4, and 20.1 m for dead fine root biomass in plots 1, 2, and 3, respectively. For comparison, Bayesian method was also used to estimate the ranges for the fine root biomass. The results obtained by geostatistic method and Bayesian method were consistent with each other.
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Affiliation(s)
- Shu-Tang Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Wang M, Guan DX, Han SJ, Wu JL. Comparison of eddy covariance and chamber-based methods for measuring CO2 flux in a temperate mixed forest. Tree Physiol 2010; 30:149-163. [PMID: 19955193 DOI: 10.1093/treephys/tpp098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Two methods, eddy covariance and chamber-based measurements, were employed to measure the net ecosystem CO(2) exchange in a mature temperate mixed forest in 2003. The eddy covariance system was used as a reference, which was compared with the chamber-based method. Based on chamber fluxes, the ecosystem had a gross primary production of 1490 g C m(-2) year(-1), 90% of which was released as efflux back into the air via respiration of the entire ecosystem. This was comprised of about 48% from soil surface CO(2) efflux, 31% from leaf respiration and 21% from stem and branch respiration. Net ecosystem exchange (NEE), estimated from the sum of daily component fluxes, was 146 g C m(-2) year(-1). Ecosystem respiration (ER), estimated from the sum of daily ecosystem respiration, was 1240 g C m(-2) year(-1). NEE was 9.8% of actual gross primary production (GPP). The eddy covariance estimates of NEE, ER and GPP were 188, 1030 and 1220 g C m(-2) year(-1), respectively. The eddy covariance estimation of NEE was higher than that of the chamber-based estimation by 22.5%. On a daily basis, NEE of the scaled chamber measurements was in acceptable agreement with eddy covariance measurement data with R(2) values of 0.71. The discrepancy between the measurement of the two methods was greater in the non-growing season primarily due to the lack of spatial variability in the scaled chamber estimates and weak atmosphere turbulence by eddy covariance measurements. There are many uncertainties for determination of absolute values of ecosystem component flux. More detailed experiments and related theoretical studies are needed in the future.
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Affiliation(s)
- Miao Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Tang FD, Han SJ, Zhang JH. [Carbon dynamics of broad-leaved Korean pine forest ecosystem in Changbai Mountains and its responses to climate change]. Ying Yong Sheng Tai Xue Bao 2009; 20:1285-1292. [PMID: 19795634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
By using process model Sim-CYCLE based on dry matter production theory, this paper estimated the gross primary productivity (GPP), net primary productivity (NPP), net ecosystem productivity (NEP), ecosystem carbon storage (WE), total plant carbon storage (WP), and total soil carbon storage (WS) of broad-leaved Korean pine forest ecosystem in Changbai Mountains from 1982 to 2003, and analyzed the variations of these indices under present climate condition and carbon equilibrium state as well as the responses of these indices to climate change scenarios in the future. Under present climate condition, the estimated GPP, NPP, and NEP were 14.9, 8.7, and 2.7 Mg C x hm(-2) x a(-1), being 2.8 Mg C x hm(-2) x a(-1) less and 1.4 and 0.2 Mg C x hm(-2) x a(-1) higher than the measured values, respectively. The NEP in June-August occupied more than 90% of the annual NEP, and the maximum monthly NEP appeared in July (1.23 Mg C x hm(-2) month(-1)). The estimated WE, WP, and WS were 550.8, 183.8, and 367.0 Mg C x hm(-2), respectively, very close to the measured values. From present climate condition to carbon equilibrium state, the estimated carbon storages of the forest ecosystem increased to some extent, with the GPP and NPP being 17.7 and 7.3 Mg C x hm(-2) x a(-1), respectively, suggesting that the role of the forest ecosystem as a carbon "sink" declined gradually with the increase of carbon storage. A 2 degree C-increment of air temperature did not benefit the increase of GPP, NPP and NEP, while doubling CO2 concentration was in adverse. The effects of the combination of doubling CO2 concentration and 2 degree C-increment of air temperature on the GPP, NPP, and NEP were similar to those of doubling CO2 concentration. The climate change scenario in the future had the same effects both on the carbon storage and on the productivity of the forest ecosystem, which was mainly correlated to the effects of primary productivity on the carbon storage.
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Affiliation(s)
- Feng-De Tang
- College of Environmental Sciences, Liaoning University, Shenyang 110036, China.
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Kang ES, Han SJ, Kim HJ, Kim SH, Ahn CW, Cha BS, Nam M, Lee HC. Abstract: P878 ASSOCIATION BETWEEN C609T VARIANT IN NQO1 AND CAROTID ARTERY PLAQUES IN PATIENTS WITH TYPE 2 DIABETES. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70999-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Han SJ, Fitzpatrick CSB, Wetherill A. Simulation on combined rapid gravity filtration and backwash models. Water Sci Technol 2009; 59:2429-2435. [PMID: 19542649 DOI: 10.2166/wst.2009.308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Combined rapid gravity filtration and backwash models have been applied to simulate filtration and backwash cycles. The simulated results from the backwash model suggest that an optimum air flow rate exists to maximise particle removal efficiency in the backwash operation for a certain backwash system. The simulation of combined rapid gravity filtration and backwash models suggests that the filter should not be completely cleaned up in the backwash and a certain amount of particles retained on filter grains after backwash can be beneficial for subsequent filtration runs. This is consistent with the experimental results in the literature.
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Affiliation(s)
- S J Han
- Department of Civil, Environmental & Geomatic Engineering, University College London, London WC1E 6BT, UK.
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Han SJ, Fitzpatrick CSB, Wetherill A. Simulation of combined rapid gravity filtration and backwash models. Water Sci Technol 2009; 60:1361-1368. [PMID: 19717925 DOI: 10.2166/wst.2009.5_erratum2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Combined rapid gravity filtration and backwash models are applied to simulate filtration and backwash cycles. The simulated results from the backwash model suggest that air flow rate can be optimised to maximise particle removal efficiency in the backwash for a particular system. The simulation of combined rapid gravity filtration and backwash models suggests that efficient backwash operation is essential for maintaining the life time of a filter. However, the filter is not advised to be completely cleaned up in the backwash and the particles retained on filter grains after the backwash can be beneficial for subsequent filtration runs.
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Affiliation(s)
- S J Han
- Department of Civil, Environmental & Genomatic Engineering, University College London. London, UK.
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Shi TT, Guan DX, Wu JB, Wang AZ, Jin CJ, Han SJ. Comparison of methods for estimating evapotranspiration rate of dry forest canopy: Eddy covariance, Bowen ratio energy balance, and Penman-Monteith equation. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jd010174] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Li XF, Han SJ, Hu YL, Zhao YT. [Decomposition of litter organic matter and its relations to C, N and P release in secondary conifer and broadleaf mixed forest in Changbai Mountains]. Ying Yong Sheng Tai Xue Bao 2008; 19:245-251. [PMID: 18464626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
By using litterbag method, the decomposition processes of 9 types of foliar litter in secondary conifer and broadleaf mixed forest in Changbai Mountains were assessed during a period of 34 months. The initial N and P concentrations varied greatly among the litters, and there were significant relationships between litter decomposition constant (k) and initial N concentration and C/N. The percent organic matter remaining had a significant linear correlation with percent C remaining, and a significant polynomial correlation with percent N and P remaining. The percent N and P remaining increased with the decomposition of organic matter in its initial decomposition phase, but decreased gradually in the latter decomposition phase. C/N and C/P declined with the decrease of percent organic matter remaining, and the differences in C/N or C/P among litter types decreased, being approached to 23 and 350, respectively by the end of the study. During organic matter decomposition, N/P did not change greatly, and the differences in N/P between litter types declined when the percent organic matter remaining was below 25%. Our study showed that percent of C, N and P mass remaining can be predicted by percent of organic matter mass remaining.
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Affiliation(s)
- Xue-Feng Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Guan DX, Wu JB, Wang AZ, Jin CJ, Shi TT, Han SJ. [Simulation of crown leaf area index of Korean pine and broadleaved mixed forest in Chang-Bai mountains]. Ying Yong Sheng Tai Xue Bao 2007; 18:499-503. [PMID: 17552182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Based on the 3-year successive automatic measurement of photosynthetic active radiation above and under the crown of Korean pine and broadleaved mixed forest in Changbai Mountains, as well as the seasonal observation on leaf area index, a semi-empirical model was established to estimate the crown leaf area index of the forest. The results showed that this model could well reflect the seasonal variation of crown leaf area. From the comparison of 3-year leaf area index series, it was found that the date when the leaf area index began to rise was postponed if the date when its air temperature stably surpassed 0 degrees C came late. The dynamics of the leaf area index in whole growth season could be divided into three stages, i. e., rising, relatively stable, and dropping, and at each stage, there was a greater correlation between the leaf area index and the accumulated temperature above 0 degrees C, which could be expressed by Logistic curve and linear equation. The problems existing in the observation and estimation of forest crown leaf area index were discussed.
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Affiliation(s)
- De-Xin Guan
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Kim HK, Han SJ, Kim JL, Kim BH, Chang SY, Lee JK. Monte Carlo simulation of the photon beam characteristics from medical linear accelerators. Radiat Prot Dosimetry 2006; 119:510-3. [PMID: 16644954 DOI: 10.1093/rpd/nci636] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The MCNPX code has been employed on a personal computer to calculate the dosimetric characteristics of the photon beams from the 6 MV Siemens MX2 and the 10 MV Varian Clinac 2100C linear accelerators. A model of the treatment head includes the major geometric structure within the beam path. The model was used to calculate the energy spectra of the photon beam, percentage depth dose and the dose profiles. The accuracy of the calculated results is examined by comparing them with the measured dose distributions for the two machines. The computed and measured depth dose curves agree to within 2% for all the depths beyond the build-up region for both treatment machines. The calculations agree to within 2% of the measured profiles within the 100-50% dose level. It has been found that the MCNPX code is an effective tool for simulating the clinical photon beam.
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Affiliation(s)
- H K Kim
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea.
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Choi KJ, Kim SC, Kim SK, Kim WK, Kim IK, Kim JE, Kim JC, Kim HY, Kim HH, Park KW, Park WH, Song YT, Oh SM, Lee DS, Lee SK, Lee SC, Jhung SY, Jhung SE, Jung PM, Choi SO, Choi SH, Han SJ, Huh YS, Hong C, Hwhang EH. Biliary Atresia in Korea: A Survey by the Korean Association of Pediatric Surgeons. ACTA ACUST UNITED AC 2002. [DOI: 10.13029/jkaps.2002.8.2.143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- K J Choi
- Korean Association of Pediatric Surgeons, Korea
| | - S C Kim
- Korean Association of Pediatric Surgeons, Korea
| | - S K Kim
- Korean Association of Pediatric Surgeons, Korea
| | - W K Kim
- Korean Association of Pediatric Surgeons, Korea
| | - I K Kim
- Korean Association of Pediatric Surgeons, Korea
| | - J E Kim
- Korean Association of Pediatric Surgeons, Korea
| | - J C Kim
- Korean Association of Pediatric Surgeons, Korea
| | - H Y Kim
- Korean Association of Pediatric Surgeons, Korea
| | - H H Kim
- Korean Association of Pediatric Surgeons, Korea
| | - K W Park
- Korean Association of Pediatric Surgeons, Korea
| | - W H Park
- Korean Association of Pediatric Surgeons, Korea
| | - Y T Song
- Korean Association of Pediatric Surgeons, Korea
| | - S M Oh
- Korean Association of Pediatric Surgeons, Korea
| | - D S Lee
- Korean Association of Pediatric Surgeons, Korea
| | - S K Lee
- Korean Association of Pediatric Surgeons, Korea
| | - S C Lee
- Korean Association of Pediatric Surgeons, Korea
| | - S Y Jhung
- Korean Association of Pediatric Surgeons, Korea
| | - S E Jhung
- Korean Association of Pediatric Surgeons, Korea
| | - P M Jung
- Korean Association of Pediatric Surgeons, Korea
| | - S O Choi
- Korean Association of Pediatric Surgeons, Korea
| | - S H Choi
- Korean Association of Pediatric Surgeons, Korea
| | - S J Han
- Korean Association of Pediatric Surgeons, Korea
| | - Y S Huh
- Korean Association of Pediatric Surgeons, Korea
| | - C Hong
- Korean Association of Pediatric Surgeons, Korea
| | - E H Hwhang
- Korean Association of Pediatric Surgeons, Korea
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Abstract
The history of fetal surgery features an absolute dependency upon the possibility of diagnosis before birth. Powerful new imaging methods, the techniques of sampling amniotic fluid and fetal tissue, and modern molecular genetics for the prenatal diagnosis of various congenital diseases have removed the veil of secrecy from the fetus. Even though most prenatally detected congenital malformations can be managed after maternal transport, a few simple anatomic defects require fetal surgery, albeit with predictably poor results. The understanding of intrauterine physiology and pathophysiology in several congenital malformations has been worked out in animal model study, and the natural history of congenital defects revealed by prenatal observations on human fetuses. Selection criteria for intrauterine intervention have been developed. Over the last two decades, surgical techniques for open and endoscopic fetal surgery have been defined and anesthesia and tocolysis for fetal surgery improved. As we enter the 21st century, this field of surgery will surely expand.
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Affiliation(s)
- S J Han
- Division of Pediatric Surgery, Department of Surgery, Yonsei University College of Medicine, C.P.O. Box 8044, Seoul 120-752, Korea
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Abstract
The Mediator complex of Saccharomyces cerevisiae is required for diverse aspects of transcription by RNA polymerase II (pol II). Mediator is composed of two functionally distinct subcomplexes, Rgr1 and Srb4. To identify the structures and functions of each subcomplex, we expressed recombinant proteins for each subunit and assayed their interactions with each other and with basal transcription proteins. The Rgr1 subcomplex is composed of the Gal11 module, which binds activators, and the Med9/10 module. The Med9/10 module is required for both transcriptional activation and repression, and these activities appear to be carried out by two submodules. Proteins in the Med9 submodule interact physically and genetically with Srb10/11, suggesting that the Med9 submodule mediates the repression of pol II. Purified recombinant Srb4 subcomplex stimulated basal transcription of pol II but had little effect on activated transcription and phosphorylation of the C-terminal domain of the Rpb1 subunit of pol II. Both subcomplexes of Mediator interacted with a distinct set of basal transcription factors and pol II. The modular organization of Mediator and the associated functions suggest that the Mediator complex may recruit and/or stabilize the preinitiation complex through several points of contact with transcriptional regulators and basal transcription factors.
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Affiliation(s)
- J S Kang
- National Creative Research Center for Genome Regulation, Department of Biochemistry, Yonsei University, Seoul 120-749, Korea
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Abstract
The yeast Mediator is composed of two subcomplexes, Rgr1 and Srb4, known to be required for diverse aspects of transcriptional regulation; however, their structural and functional organizations have not yet been deciphered in detail. Biochemical analyses designed to determine the subunit composition of the Rgr1 subcomplex revealed that the regulator-interacting subcomplex has a modular structure and is composed of the Gal11, Med9/Cse2, and Med10/Nut2 modules. Genome-wide gene expression and Northern analyses performed in the presence or absence of the various Mediator modules revealed a distinct requirement for the Gal11, Med9/Cse2, and Med10/Nut2 modules in transcriptional repression as well as activation. GST pull-down analysis revealed that the transcriptional repressor Tup1 binds to distinct but overlapping regions of the Gal11 module that were shown previously to be transcriptional activator binding sites. These data suggest that competition between transcriptional activators and repressors for a common binding site in the Mediator and distinct conformational changes in the Mediator induced by repressor binding may underlie the mechanism of transcriptional repression in eukaryotes.
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Affiliation(s)
- S J Han
- National Creative Research Initiative Center for Genome Regulation, Department of Biochemistry, 134 Sinchon-dong, Seodaemoon-ku, Yonsei University, Seoul 120-749, Korea
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